Get rid of all the library tags.

test/serve/gets_first_if_transitive_dependency_is_not_installed_test.dart

Index: test/serve/gets_first_if_transitive_dependency_is_not_installed_test.dart
diff --git a/test/serve/gets_first_if_transitive_dependency_is_not_installed_test.dart b/test/serve/gets_first_if_transitive_dependency_is_not_installed_test.dart
index 280f0f37b151daaefb288073c6e0b28395b7c822..6da288c7f1b716539e7ed6df941e8b89ad381d0b 100644
--- a/test/serve/gets_first_if_transitive_dependency_is_not_installed_test.dart
+++ b/test/serve/gets_first_if_transitive_dependency_is_not_installed_test.dart
@@ -2,8 +2,6 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-library pub_tests;
-
 import 'package:path/path.dart' as path;
 import 'package:pub/src/io.dart';
 import 'package:scheduled_test/scheduled_test.dart';